Page 4 - World Wide Web- 1832

WWW concepts

Storing, locating, and transmitting information on the Web comes under basic WWW concepts.

Clients, servers, and sites

On the Web, information is stored at Web sites. Access to the information at a Web site is managed by a
Web server for the site. Users access the information using a Web client, which is also called a browser.
Microsoft Windows, Machintosh etc. where the user is always presented to the same GUI interface. The
server is responsible for handling the request sent from the client. This can either be a local accessible
resource or the server can request the resource from another server in which case the first server
temporarily turns into a client.

How information is stored: HTML

Information on the Web is stored in documents, using a language named HTML (HyperText Markup Language). Web
clients interpret HTML and display the documents to a user. The protocol that governs the exchange of information
between the Web server and Web client is named HTTP (HyperText Transfer Protocol).

Hypertext Transport Protocol HTTP

The client sends of the user request to a WWW server using the Hypertext Transfer
Protocol (HTTP). This is a typical client-server application based on a stateless
connection between the client requesting the URI and the server handling the request.

How information is located: the URL

To move from one page of a document to another page, or to another document on the same or another Web site, the
user clicks a link in the document shown in their Web client. Documents and locations within documents are
identified by an address that is called a Uniform Resource Locator, or URL.

.Hyperlinks, book marks, cookies